import 'package:flutter/material.dart';
import '../service/service_method.dart';
import 'package:flutter_swiper/flutter_swiper.dart';
import 'dart:convert';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:url_launcher/url_launcher.dart';
import 'package:flutter_easyrefresh/easy_refresh.dart';

class HomePage extends StatefulWidget {
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> with AutomaticKeepAliveClientMixin {
  
  int page = 1;
  List<Map> hotGoodsList = [];

  GlobalKey<RefreshFooterState> _footerkey = new GlobalKey<RefreshFooterState>();

  @override
  bool get wantKeepAlive => true;

  @override
  void initState() { 
    super.initState();
    print('11111111');
  }

  @override
  Widget build(BuildContext context) {
    var formData = {'lon':'115.02932', 'lat':'35.76189'};
    return Scaffold(
      appBar: AppBar(title: Text('百姓生活+'),),
      body: FutureBuilder(
        future: request('homePageContent', formData:formData),
        builder: (context, snapshot){
          if(snapshot.hasData) {
            var data = json.decode(snapshot.data.toString());
            List<Map> swiper = (data['data']['slides'] as List).cast();
            List<Map> navgatorList = (data['data']['category'] as List).cast();
            String adPicture = data['data']['advertesPicture']['PICTURE_ADDRESS'];
            String leaderImage = data['data']['shopInfo']['leaderImage'];
            String leaderPhone = data['data']['shopInfo']['leaderPhone'];
            List<Map> recommendList = (data['data']['recommend'] as List).cast();
            String floor1Title = data['data']['floor1Pic']['PICTURE_ADDRESS'];
            String floor2Title = data['data']['floor1Pic']['PICTURE_ADDRESS'];
            String floor3Title = data['data']['floor1Pic']['PICTURE_ADDRESS'];
            List<Map> floor1 = (data['data']['floor1'] as List).cast();
            List<Map> floor2 = (data['data']['floor2'] as List).cast();
            List<Map> floor3 = (data['data']['floor3'] as List).cast();
            return EasyRefresh(
              refreshFooter: ClassicsFooter(
                key: _footerkey,
                bgColor: Colors.white,
                textColor: Colors.pink,
                moreInfoColor: Colors.pink,
                showMore: true,
                noMoreText: '',
                moreInfo: '加载中',
                loadReadyText: '上拉加载....'
              ),
              child: ListView(
                children: <Widget>[
                  SwiperDiy(swiperDateList:swiper),
                  TopNavigator(navgatorList: navgatorList),
                  AdBanner(adPicture: adPicture,),
                  LeaderPhone(leaderImage: leaderImage, leaderPhone: leaderPhone),
                  Recommend(recommendList: recommendList),
                  FloorTitle(pictureAddress: floor1Title),
                  FloorContent(floorGoodsList: floor1),
                  FloorTitle(pictureAddress: floor2Title),
                  FloorContent(floorGoodsList: floor2),
                  FloorTitle(pictureAddress: floor3Title),
                  FloorContent(floorGoodsList: floor3),
                  _hotGoods(),
                  // HotGoods(),
                ],
              ),
              loadMore:() async {
                print('开始加载更多数据');
                var formPage = {'page': page};
                await request('homePageBelowConten', formData: formPage).then((val){
                  var data = json.decode(val.toString());
                  List<Map> newGoodsList = (data['data'] as List).cast();
                  setState(() {
                    hotGoodsList.addAll(newGoodsList);
                    page++;
                  });
                });
              },
            );
          } else {
            return Center(
              child: Text('加载中'),
            );
          }
        },
      )
    );
  }
  Widget hotTitle = Container(
    margin: EdgeInsets.only(top: 10.0),
    alignment: Alignment.center,
    color: Colors.transparent,
    padding: EdgeInsets.fromLTRB(0, 5.0, 0, 5.0),
    child: Text('火爆专区'),
  );

  Widget _wrapList() {
    if(hotGoodsList.length != 0) {
      List<Widget> listWidget = hotGoodsList.map((val){
        return InkWell(
          onTap: (){},
          child: Container(
            width: ScreenUtil().setWidth(372),
            color: Colors.white,
            padding:EdgeInsets.all(5.0),
            margin: EdgeInsets.only(bottom: 3.0),
            child:  Column(
              children: <Widget>[
                Image.network(val['image'], width: ScreenUtil().setWidth(370)),
                Text(
                  val['name'],
                  maxLines: 1,
                  overflow: TextOverflow.ellipsis,
                  style: TextStyle(color: Colors.pink, fontSize: ScreenUtil().setSp(26)),
                ),
                Row(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: <Widget>[
                    Text('￥${val['mallPrice']}'),
                    Text(
                      '￥${val['price']}',
                      style: TextStyle(color: Colors.black26, decoration: TextDecoration.lineThrough),
                    ),
                  ],
                )
              ],
            ),
          ),
        );
      }).toList();
      return Wrap(
        spacing: 2,
        children: listWidget,
      );
    } else {
      return Text('');
    }
  }
  Widget _hotGoods() {
    return Container(
      child: Column(
        children: <Widget>[
          hotTitle,
          _wrapList(),
        ],
      ),
    );
  }
}


// 首页轮播图组件
class SwiperDiy extends StatelessWidget {
  final List swiperDateList;
  // 创建构造函数
  SwiperDiy({Key key, this.swiperDateList}):super(key:key);

  @override
  Widget build(BuildContext context) {
    // print('设备像素密度：${ScreenUtil.pixelRatio}');
    // print('设备高：${ScreenUtil.screenHeight}');
    // print('设备宽：${ScreenUtil.screenWidth}');
    return Container(
      height: ScreenUtil().setHeight(333),
      width: ScreenUtil().setWidth(750),
      child: Swiper(
        itemBuilder: (BuildContext context, int index) {
          return Image.network("${swiperDateList[index]['image']}", fit: BoxFit.fill);
        },
        itemCount: swiperDateList.length,
        pagination: SwiperPagination(),
        autoplay: true,
      ),
    );
  }
}
// 首页导航
class TopNavigator extends StatelessWidget {
  final List navgatorList;

  TopNavigator({Key key, this.navgatorList}) : super(key: key);

  Widget _gridViewItemUI(BuildContext context, item){
    return InkWell(
      onTap:(){print('点击了导航');},
      child: Column(
        children: <Widget>[
          Image.network(item['image'], width: ScreenUtil().setWidth(95)),
          Text(item['mallCategoryName'])
        ],
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    if(this.navgatorList.length > 10) {
      this.navgatorList.removeRange(10, this.navgatorList.length);
    }
    return Container(
      height: ScreenUtil().setHeight(320),
      padding: EdgeInsets.all(3.0),
      child: GridView.count(
        physics: NeverScrollableScrollPhysics(),
        crossAxisCount: 5,
        padding: EdgeInsets.all(5.0),
        children: navgatorList.map((item){
          return _gridViewItemUI(context, item);
        }).toList(),
      ),
    );
  }
}
// 首页广告
class AdBanner extends StatelessWidget {
  final String adPicture;

  AdBanner({Key key, this.adPicture}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return Container(
      child: Image.network(adPicture),
    );
  }
}
// 首页店长电话模块
class LeaderPhone extends StatelessWidget {
  final String leaderImage;
  final String leaderPhone;

  LeaderPhone({Key key, this.leaderImage, this.leaderPhone}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Container(
      child: InkWell(
        onTap: _launcherURL,
        child: Image.network(leaderImage),
      ),
    );
  }

  void _launcherURL() async {
    String url = 'tel:' + leaderPhone;
    // print('电话'+leaderPhone);
    if(await canLaunch(url)) {
      await launch(url);
    } else {
      throw 'url异常，不能访问';
    }
  }
}
// 商品推荐
class Recommend extends StatelessWidget {
  final List recommendList;

  Recommend({Key key, this.recommendList}) : super(key: key);
  // 标题方法
  Widget _titleWidget() {
    return Container(
      alignment: Alignment.centerLeft,
      padding: EdgeInsets.fromLTRB(10.0, 2.0, 0, 5.0),
      decoration: BoxDecoration(
        color: Colors.white,
        border: Border(
          bottom:  BorderSide(width: 0.5, color: Colors.black12)
        )
      ),
      child: Text(
        '商品推荐',
        style: TextStyle(color: Colors.pink)
      ),
    );
  }

  // 商品单独项
  Widget _item(index) {
    return InkWell(
      onTap: () {},
      child: Container(
        height: ScreenUtil().setHeight(330),
        width: ScreenUtil().setWidth(250),
        padding: EdgeInsets.fromLTRB(8.0, 8.0, 8.0, 3.0),
        decoration: BoxDecoration(
          color: Colors.white,
          border: Border(
            left: BorderSide(width: 1, color: Colors.black12)
          )
        ),
        child: Column(
          children: <Widget>[
            Image.network(recommendList[index]['image']),
            Text('￥${recommendList[index]['mallPrice']}'),
            Text(
              '￥${recommendList[index]['Price']}',
              style: TextStyle(
                decoration: TextDecoration.lineThrough,
                color: Colors.grey,
              ),
            ),
          ],
        ),
      ),
    );
  }

  // 横向列表方法
  Widget _recommedList() {
    return Container(
      height: ScreenUtil().setHeight(340),
      child: ListView.builder(
        scrollDirection: Axis.horizontal,
        itemCount: recommendList.length,
        itemBuilder: (context, index) {
          return _item(index);
        },
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Container(
      height: ScreenUtil().setHeight(420),
      margin: EdgeInsets.only(top: 10.0),
      child: Column(
        children: <Widget> [
          _titleWidget(),
          _recommedList(),
        ]
      ),
    );
  }
}

// 楼层标题

class FloorTitle extends StatelessWidget {
  final String pictureAddress;
  FloorTitle({Key key, this.pictureAddress}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return Container(
      padding: EdgeInsets.all(8.0),
      child: Image.network(pictureAddress),
    );
  }
}
//楼层商品列表
class FloorContent extends StatelessWidget {
  final List floorGoodsList;
  FloorContent({Key key, this.floorGoodsList}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return Container(
      child: Column(
        children: <Widget>[
          _firstRow(),
          _otherGoods(),
        ],
      ),
    );
  }
  Widget _firstRow() {
    return Row(
      children: <Widget>[
        _goodsItem(floorGoodsList[0]),
        Column(
          children: <Widget>[
            _goodsItem(floorGoodsList[1]),
            _goodsItem(floorGoodsList[2]),
          ],
        )
      ],
    );
  }

  Widget _otherGoods() {
    return Row(
      children: <Widget>[
        _goodsItem(floorGoodsList[3]),
        _goodsItem(floorGoodsList[4]),
      ],
    );
  }

  Widget _goodsItem(Map goods) {
    return Container(
      width: ScreenUtil().setWidth(375),
      child: InkWell(
        onTap: (){print('点击了楼层商品');},
        child: Image.network(goods['image']),
      ),
    );
  }
}

// 获取火爆商品